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Configuration Guide - Interface Management

S9300, S9300E, and S9300X V200R013C00

This document describes the interface management configuration, including basic interface configuration, Ethernet interface configuration, and logical interface configuration.
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Configuring the Interface Rate

Configuring the Interface Rate

Context

You can configure the rate of an Ethernet interface in the following three scenarios:

  • Auto-negotiation mode: You can run the negotiation auto command to configure an Ethernet interface to work in auto-negotiation mode. Interfaces at both ends of a link negotiate the interface rate. You can configure the rate of an Ethernet interface in the following situations:

    • If the negotiated interface rate is not the required value, you can run the auto speed command to manually set the interface rate. As shown in Figure 2-2, Server1, Server2, and Server3 form a server cluster and their network adapter rates are all 1000 Mbit/s. The rate of GE1/0/4 connecting the server cluster to the Internet is also 1000 Mbit/s. If the auto-negotiation rate is not specified on the device, the rates negotiated by GE1/0/1, GE1/0/2, and GE1/0/3 and their connected servers are all 1000 Mbit/s. When the three servers concurrently send data at the rate of 1000 Mbit/s, the outbound interface GE1/0/4 will be congested. To prevent this situation, configure the auto-negotiation rate to 100 Mbit/s for GE1/0/1, GE1/0/2, and GE1/0/3.
      Figure 2-2  Networking diagram for configuring the auto-negotiation rate

    • If the network cable rate needs to be considered during interface rate negotiation, you can run the set ethernet speed down-grade command to configure the rate decrease auto-negotiation function.

      In auto-negotiation mode, the negotiated interface rate depends only on the maximum rate of connected interfaces, without considering the rate of the network cable connecting the interfaces. In this case, the connected interfaces will use the same negotiated rate but cannot go Up. For example, two GE interfaces are connected using a network cable and their maximum rates are both 1000 Mbit/s. If the network cable can only work at the rate of 10 Mbit/s or 100 Mbit/s, the two GE interfaces cannot go Up because the network cable cannot work at the rate of 1000 Mbit/s.

      You can use the rate decrease auto-negotiation function to solve this problem. After rate decrease auto-negotiation is enabled, the two GE interfaces can decrease the negotiated rate to 10 Mbit/s or 100 Mbit/s, and then can go Up.

  • Non-auto-negotiation mode: You can run the undo negotiation auto command to configure an Ethernet interface to work in non-auto-negotiation mode, and run the speed command to manually set the interface rate so that the local and remote interfaces can communicate.

  • XGE optical interface that has an XGE/GE optical module installed: You can run the speed auto 1000 and undo speed auto commands to configure the local interface to work at the same rate as the remote interface so that the local and remote interfaces can communicate.

NOTE:

Procedure

  • Configuring the interface rate in auto-negotiation mode
    • Manually configuring the interface rate in auto-negotiation mode

      NOTE:

      This configuration takes effect only on an electrical interface or an optical interface that has a copper module installed.

      1. Run system-view

        The system view is displayed.

      2. Run interface interface-type interface-number

        The Ethernet interface view is displayed.

      3. Run negotiation auto

        The Ethernet interface is configured to work in auto-negotiation mode.

        By default, Ethernet interfaces work in auto-negotiation mode.

      4. Run auto speed { 10 | 100 | 1000 }*

        The Ethernet interface rate is configured. FE electrical interfaces do not support 1000.

        By default, an Ethernet interface negotiates the rate with the remote interface.

    • Configuring rate decrease auto-negotiation in auto-negotiation mode
      1. Run system-view

        The system view is displayed.

      2. Run set ethernet speed down-grade

        The rate decrease auto-negotiation function is enabled on interfaces.

        By default, rate decrease auto-negotiation is disabled on an interface.

  • Configuring the interface rate in non-auto-negotiation mode
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The Ethernet interface view is displayed.

    3. Run undo negotiation auto

      The Ethernet interface is configured to work in non-auto-negotiation mode.

      By default, Ethernet interfaces work in auto-negotiation mode.

    4. Run speed { 10 | 100 | 1000 }

      The Ethernet interface rate is configured. FE electrical interfaces do not support 1000.

      By default, an Ethernet interface works at the maximum rate supported by it.

  • Setting the interface rate to 1000 Mbit/s for an XGE optical interface that has an XGE/GE optical module installed
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The Ethernet interface view is displayed.

    3. Run speed auto 1000 or speed 1000

      The interface rate is set to 1000 Mbit/s for the XGE optical interface that has an XGE/GE optical module installed.

      By default, an XGE optical interface that has an XGE/GE optical module installed works at the rate of 10000 Mbit/s.

      NOTE:

      The speed auto 1000 command sets the rate of an interface to 1000 Mbit/s and configures the interface to work in auto-negotiation mode. The undo speed auto command restores the default interface rate of 10000 Mbit/s and restores the default non-auto-negotiation mode. Before running these commands, ensure that interfaces at both ends of a link work in the same auto-negotiation mode. Otherwise, the interfaces will not communicate with each other.

Verifying the Configuration

Run the display interface [ interface-type [ interface-number ] ] command in any view or the display this interface command in the interface view to check the current interface status. Check the Speed field in the command output.

Translation
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Updated: 2019-04-09

Document ID: EDOC1100065861

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